testInvoice py3

bt5/erp5_simplified_invoicing/TestTemplateItem/portal_components/test.erp5.testInvoice.py

@@ -567,7 +567,7 @@ class TestInvoice(TestInvoiceMixin):
     output = BytesIO()
     output.write(odt)
     m = OpenDocumentTextFile(output)
-    text_content=m.toString().encode('ascii','replace')
+    text_content=m.toString().encode('ascii','replace').decode()
     if text_content.find('Resource Tax') != -1 :
       self.fail('fail to delete the tax line in product line')
     if text_content.find('Tax Code') == -1 :
@@ -640,7 +640,7 @@ class TestInvoice(TestInvoiceMixin):
     parser = OOoParser()
     parser.openFromBytes(odt)
     style_xml = parser.oo_files['styles.xml']
-    self.assertNotIn('<draw:image', style_xml)
+    self.assertNotIn(b'<draw:image', style_xml)
 
   def test_Invoice_viewAsODT_invalid_image(self):
     resource = self.portal.getDefaultModule(